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Convert lat/long coordinates to pixel XY coordinates

Source: R/latlong_to_qk_functions.R
latlong_to_pixelXY.Rd

Converts a point from latitude/longitude WGS-84 coordinates (in degrees) into pixel XY coordinates at a specified zoom level. For further information, refer to the Microsoft Bing Maps Tile System documentation.

Usage

latlong_to_pixelXY(lat, lon, zoom)

Arguments

lat

Latitude of the point, in degrees.

lon

Longitude of the point, in degrees.

zoom

Zoom or level of detail, from 1 (lowest detail) to 23 (highest detail).

Value

A list returning pixel X and pixel Y coordinates.

Details

Converting latitude/longitude coordinates into a QuadKey and then back to latitude/longitude won't yield identical values, unless the initial latitude/longitude coordinates correspond to the upper-left Quadkey's pixel and tile XY coordinates at the same zoom level.

Understanding this distinction is crucial for the accurate use of these functions in coordinate conversions.

For a detailed explanation on how to use this and other similar quadkeyr functions, read the the vignette: https://fernandez-lab-wsu.github.io/quadkeyr/articles/quadkey_to_sf_conversion.html

References

https://learn.microsoft.com/en-us/bingmaps/articles/bing-maps-tile-system

Examples


latlong_to_pixelXY(
  lat = -35,
  lon = -50,
  zoom = 6
)
#> $pixelX
#> [1] 5916
#> 
#> $pixelY
#> [1] 9894
#>